Annual report pursuant to Section 13 and 15(d)

Income Tax - Reconciliation of Income Tax Attributable to Operations (Detail)

v3.20.4
Income Tax - Reconciliation of Income Tax Attributable to Operations (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Income Tax Disclosure [Abstract]      
Income tax recovery at statutory rates (at a rate of 21% for all years presented) $ (3,094) $ (3,490) $ (2,664)
Expenses not deducted for tax purposes 118 116 70
Effect of tax rate changes on deferred tax assets and liabilities 34 (13) (1,416)
Rate differential on foreign earnings (103) (296) (165)
Investment tax credits (23) (84)  
Change in valuation allowance 3,662 (3,246) 4,182
Book to tax return adjustments (518) (75) 20
Unrecognized tax benefits   7,192  
Reversal of previously accrued taxes due to IRS reassessment   (221)  
Other $ (76) (104) $ (27)
Income tax expense/(recovery)   $ (221)